G.R.

例句：

1. 1. The theory of relativity revolutionized our understanding of space and time.
   相对论理论彻底改变了我们对时间和空间的理解。
2. 2. In the early days of space exploration, scientists were fascinated by the idea of gravity bending light.
   在太空探索的早期阶段，科学家们对引力弯曲光线的想法感到着迷。
3. 3. The gravitational pull of a massive object can change the trajectory of an object in space.
   一个巨大物体的引力可以改变太空中物体的轨迹。